T o develop analogues of phenylalkyl isothiocyanate with less toxicity and better biological activity, two water-soluble phenylalkyl isothiocyanate-cysteine conjugates, S-[N-benzyl (thiocarbamoyl)]-cysteine (1) and S-[N-(bphenyl-propyl)(thiocarbamoyl)]-cysteine (2), were synthesized. The induction of increased activity of the detoxifying enzyme glutathione S- transferase by the conjugates and their parent compounds was determined and compared ...